About 8 1/4" square, surplus item from building construction. Heavy duty locking unit for mounting on exterior wall. Allows you to run an exterior temporary building or tent from an internal main cooling unit. Standard fittings, new and undamaged. Comes with two keys which are shown in the photos in the lock. Stainless steel and brass, first rate industrial quality such as you would find installed in many schools these days. For units which use refrigerated liquid CO2 standard UN 2187. Will cost you two to three times the price here to get one from a supplier. See shipping calculator for rates to your address. Shipping for this item by Flat Rate Priority Box only, it comes with insurance and probably is the least expensive anyway. Normal handling time is 3-5 days but may be up to 10 days for some items.